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Titolo:
Operating experience with an ozone-based ECF bleaching sequence - Results have exceeded initial expectations
Autore:
Munro, F; Griffiths, J;
Indirizzi:
Domtar Inc, Espanola, ON, Canada Domtar Inc Espanola ON CanadaDomtar Inc, Espanola, ON, Canada
Titolo Testata:
PULP & PAPER-CANADA
fascicolo: 9, volume: 102, anno: 2001,
pagine: 35 - 39
SICI:
0316-4004(200109)102:9<35:OEWAOE>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Keywords:
chlorine free bleaching; multistage process; ozone bleaching; cost analysis; pollution control; pulp properties;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
0
Recensione:
Indirizzi per estratti:
Indirizzo: Munro, F Domtar Inc, Espanola, ON, Canada Domtar Inc Espanola ON CanadaDomtar Inc, Espanola, ON, Canada
Citazione:
F. Munro e J. Griffiths, "Operating experience with an ozone-based ECF bleaching sequence - Results have exceeded initial expectations", PULP PAPER, 102(9), 2001, pp. 35-39

Abstract

A medium-consistency ozone stage was incorporated in a (ZD) configuration as part of a complete hardwood fibre line modernization at the Espanola mill. The major expectations from ozone were improved bleaching economy, a higher brightness ceiling, and reduced environmental impact. Operating resultshave exceeded expectations. Ozone has a chlorine dioxide replacement ratioof 3.5 (1 kg/t ozone replaces 3.5 kg/t chlorine dioxide) on hard to bleachspecies and a replacement ratio of 2.5 on easily bleached species, significantly improving bleaching economy. Effluent AOX, COD and colour have decreased significantly. Pulp extractives and TOX content have decreased. Pulp cleanliness is exceptional. Pulp strength and viscosity have been maintainedwith the new bleaching sequence.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 06:50:37